Inventors:
Joseph Albert Teijido - East Moline IL, US
Jeffrey Lee Wigand - Moline IL, US
Daniel Ray Anderson - Bettendorf IA, US
Robert Wayne Hawkins - Rapid City IL, US
Werner Stettler, Jr. - Cedar Falls IA, US
Helmut Weis - Massweiler, DE
Bernd Kempf - Althornbach, DE
Johann Hwang Pierce - Dewitt IA, US